Wrth gasglu a chofnodi data, gelli di eu cynrychioli mewn diagram. Gan ddibynnu ar y canlyniadau, gelli di ddefnyddio siart bar, siart cylch, graff llinell, pictogram, diagram amlder neu ddiagram ...

Understanding the construction and interpretation of pictograms. Gordon the Crow is in charge of the bird table. One day he runs out of nuts. The stock is low and he cannot work out what is needed ...